This list of implied characters is a list of characters that have not physically appeared in any form of media in time. Regardless of their lack of appearance, the implied characters have been mentioned at least once throughout Rocko Squad Prime.
Olivia's deceased grandfather. Appears in the Team Umizoomi episode called To the Library, but mentioned in Not So Sleepy Olivia after Jin Kazama wanted Olivia to take an apology note about her grandfather's death.
Veruca Salt's father
Jill Walker's deceased mother. Appears in the Barney & Friends episode called A Game for Everyone portrayed by Jacqueline Berner, but mentioned by Evil Man in Jolted Jaclyn after hearing about Jill's sadness.
The late star of The Honeymooners. Mentioned in Moving Day when Crash Gordon says one of Jackie Gleason's empty threats.
Gabi's mother. Mentioned in Gabi's Glitch when Heihachi Mishima was aware of Gabi's sadness. It is revealed in the aforementioned episode that Heihachi and Maria are friends with each other. Marie made her first appearance in Alexandra Goes to the Woods and is portrayed by Sonia Manzano.